Develop Reference

Sorting 2D Arraylist of Object

I have 2D Arralist of Object and i want to sort it upon first column which contains LocalDate
i used this code to sort it
DateTimeFormatter formatter = DateTimeFormatter.ofPattern("d/M/yyyy");
formatter = formatter.withLocale( Locale.US );
ArrayList<ArrayList<Object>> cusKashf = new ArrayList<ArrayList<Object>>();
cusKashf.addAll(new ReadBillDeateals().readSell(textField_4.getText()));
Collections.sort(cusKashf , new Comparator<ArrayList<Object>>() {
#Override
public int compare(ArrayList<Object> entry1, ArrayList<Object> entry2) {
return ((LocalDate.parse(entry1.get(0).toString(), formatter)).compareTo((LocalDate.parse(entry2.get(0).toString(), formatter))));
}
});
the problem is this code make an exception, i wonder where's the mistake in me code
this is the exception report
java.lang.IndexOutOfBoundsException: Index: 2, Size: 0
at java.util.ArrayList.rangeCheck(Unknown Source)
at java.util.ArrayList.get(Unknown Source)
at reports.Kashf$7$1.compare(Kashf.java:327)
at reports.Kashf$7$1.compare(Kashf.java:1)
at java.util.TimSort.countRunAndMakeAscending(Unknown Source)
at java.util.TimSort.sort(Unknown Source)
at java.util.Arrays.sort(Unknown Source)
at java.util.ArrayList.sort(Unknown Source)
at java.util.Collections.sort(Unknown Source)
at reports.Kashf$7.actionPerformed(Kashf.java:324)
at javax.swing.AbstractButton.fireActionPerformed(Unknown Source)
at javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source)
at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source)
at javax.swing.DefaultButtonModel.setPressed(Unknown Source)
at javax.swing.plaf.basic.BasicButtonListener$Actions.actionPerformed(Unknown Source)
at javax.swing.SwingUtilities.notifyAction(Unknown Source)
at javax.swing.JComponent.processKeyBinding(Unknown Source)
at javax.swing.JComponent.processKeyBindings(Unknown Source)
at javax.swing.JComponent.processKeyEvent(Unknown Source)
at java.awt.Component.processEvent(Unknown Source)
at java.awt.Container.processEvent(Unknown Source)
at java.awt.Component.dispatchEventImpl(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.KeyboardFocusManager.redispatchEvent(Unknown Source)
at java.awt.DefaultKeyboardFocusManager.dispatchKeyEvent(Unknown Source)
at java.awt.DefaultKeyboardFocusManager.preDispatchKeyEvent(Unknown Source)

In your cusKashf List check if the sublist is not empty.
#Override
public int compare(ArrayList<Object> entry1, ArrayList<Object> entry2) {
if(Objects.isNull(entry1) || entry1.isEmpty()) return -1;
if(Objects.isNull(entry2) || entry2.isEmpty()) return -1;
return ((LocalDate.parse(entry1.get(0).toString(), formatter)).compareTo((LocalDate.parse(entry2.get(0).toString(), formatter))));
}

One of the lists you are trying to compare are empty, try surrounding by a try and catch or check if a list is empty before getting item 0.

Class.forName() throws ClassNotFoundException

So this is my first time posting, please be gentle :3
General overview:
My goal is to be able to give my program a XSD file, then the program generates a bean, generates a nice GUI using reflection on the bean, then I can enter appropriate values into the textfields and then the program updates the bean with the values and finally marshalls the bean into a nice XML.
It's coming along pretty good, but yesterday I stumbled over an error that I can't figure out..
StackTrace
java.lang.ClassNotFoundException: X.Y.Z.BEAN_FILE_WITHOUT_.JAVA
at java.net.URLClassLoader$1.run(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Unknown Source)
at X.Y.Z.GenerateXMLService.generateBean(GenerateXMLService.java:101)
at X.Y.Z.view.Gui$1.handle(Gui.java:56)
at X.Y.Z.view.Gui$1.handle(Gui.java:1)
at com.sun.javafx.event.CompositeEventHandler.dispatchBubblingEvent(Unknown Source)
at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(Unknown Source)
at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(Unknown Source)
at com.sun.javafx.event.CompositeEventDispatcher.dispatchBubblingEvent(Unknown Source)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(Unknown Source)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(Unknown Source)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(Unknown Source)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(Unknown Source)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(Unknown Source)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(Unknown Source)
at com.sun.javafx.event.EventUtil.fireEventImpl(Unknown Source)
at com.sun.javafx.event.EventUtil.fireEvent(Unknown Source)
at javafx.event.Event.fireEvent(Unknown Source)
at javafx.scene.Node.fireEvent(Unknown Source)
at javafx.scene.control.Button.fire(Unknown Source)
at com.sun.javafx.scene.control.behavior.ButtonBehavior.mouseReleased(Unknown Source)
at com.sun.javafx.scene.control.skin.BehaviorSkinBase$1.handle(Unknown Source)
at com.sun.javafx.scene.control.skin.BehaviorSkinBase$1.handle(Unknown Source)
at com.sun.javafx.event.CompositeEventHandler$NormalEventHandlerRecord.handleBubblingEvent(Unknown Source)
at com.sun.javafx.event.CompositeEventHandler.dispatchBubblingEvent(Unknown Source)
at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(Unknown Source)
at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(Unknown Source)
at com.sun.javafx.event.CompositeEventDispatcher.dispatchBubblingEvent(Unknown Source)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(Unknown Source)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(Unknown Source)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(Unknown Source)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(Unknown Source)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(Unknown Source)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(Unknown Source)
at com.sun.javafx.event.EventUtil.fireEventImpl(Unknown Source)
at com.sun.javafx.event.EventUtil.fireEvent(Unknown Source)
at javafx.event.Event.fireEvent(Unknown Source)
at javafx.scene.Scene$MouseHandler.process(Unknown Source)
at javafx.scene.Scene$MouseHandler.access$1800(Unknown Source)
at javafx.scene.Scene.impl_processMouseEvent(Unknown Source)
at javafx.scene.Scene$ScenePeerListener.mouseEvent(Unknown Source)
at com.sun.javafx.tk.quantum.GlassViewEventHandler$MouseEventNotification.run(Unknown Source)
at com.sun.javafx.tk.quantum.GlassViewEventHandler$MouseEventNotification.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at com.sun.javafx.tk.quantum.GlassViewEventHandler.handleMouseEvent(Unknown Source)
at com.sun.glass.ui.View.handleMouseEvent(Unknown Source)
at com.sun.glass.ui.View.notifyMouse(Unknown Source)
at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
at com.sun.glass.ui.win.WinApplication.access$300(Unknown Source)
at com.sun.glass.ui.win.WinApplication$4$1.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
generateBean
public Class generateBean(File xsd) {
String finalDir = System.getProperty("user.dir") + "/src/main/java";
String xsdDir = xsd.getParentFile().getAbsolutePath();
try {
Process p = Runtime.getRuntime().exec(
"cmd /c cd " + xsdDir + " && xjc -d " + finalDir
+ " -p PACKAGE_PATH_GOES_HERE " + xsd.getName().toString());
p.waitFor();
} catch (IOException | InterruptedException e) {
Gui.errorPopUp(e);
}
/**
* Get the newly created files and put them in an array
*/
File[] fList = new File[2];
fList = new File("DIRECTORY_PATH_GOES_HERE").listFiles();
/**
* Get the file that isn't Objectfactory.java ---> that's the bean
*/
for (File file : fList) {
if (!"ObjectFactory.java".equals(file.getName())) {
String beanName = file.getName();
String beanBinaryName = "PACKAGE_PATH_GOES_HERE"
+ beanName.substring(0, beanName.length() - 5);
Class beanClass = null;
try {
beanClass = Class.forName(beanBinaryName); //this is line 101
return beanClass;
} catch (ClassNotFoundException e) {
Gui.errorPopUp(e);
}
}
}
return null;
}
So I checked first if the beanBinaryName is correct, and I think it is. It has the following format:
com.foo.foo.some.more.foo.beanbag.bean
Then I started googling with the error message and stumbled accross this post:
Link to the blog
But to be honest I didn't really understand what he was trying to explain. The stacktrace looks similar, but I just started with java a few months ago and still consider myself a newbie. Do you have any advice what the error might be? Thank in advance!
EDIT / SOLUTION:
My first mistake was trying to use class.forName() on a .java file. This only works with compiled files, e.g. .class.
After I fixed that i was still getting error messages, but after playing around with the URLClassLoader it worked :D I renamed and refactored this method compared to the method at the top, so in this one we really only get the class, while in my first example I also generate the .java files. I now do this in a seperate method to keep things organized.
public Class getClassFromBean() {
File[] fList = new File[3];
fList = new File("foo/beanbag").listFiles();
Class beanClass = null;
for (File file : fList) {
String lastSix = file.getName().toString().substring(file.getName().length() - 6);
if (".class".equals(lastSix)) {
String beanBinaryName = "foo.beanbag."
+ file.getName().toString().substring(0, file.getName().toString().length() - 6);
try {
File root = new File(System.getProperty("user.dir") + "/src/main/java");
URLClassLoader classLoader = URLClassLoader.newInstance(new URL[] { root.toURI()
.toURL() });
beanClass = Class.forName(beanBinaryName, true, classLoader);
} catch (ClassNotFoundException | MalformedURLException e) {
Gui.errorPopUp(e);
}
return beanClass;
}
}
return beanClass;
}

Method Class.forName() works only for compiled classes i.e. for files with extension '.class'. You cannot just put '.java' file to your classpath.

Convert vertex label value of the jgraph to array of strings

Basically I have this code to print the cell label of each vertex I click of the jgraph. I am trying to store the values of the cells into a string array. I have tried this:
graphComponent.getGraphControl().addMouseListener(new MouseAdapter() {
public void mousePressed(MouseEvent e) {
ArrayList<Object> objarr = new ArrayList<Object>() ;
if (e.getButton() == 3 && e.getClickCount() == 1) {
long x = e.getX();
long y = e.getY();
Object cell = graphComponent.getCellAt((int) x, (int)y);
System.out.println(graph.convertValueToString(cell));
objarr.add(cell);
}
String[] stringArray = objarr.toArray(new String[100]) ;
}
});
}
I get these errors when i try to click a vertex:
Exception in thread "AWT-EventQueue-0" java.lang.ArrayStoreException
at java.lang.System.arraycopy(Native Method)
at java.util.Arrays.copyOf(Unknown Source)
at java.util.ArrayList.toArray(Unknown Source)
at GUIquery$2.mousePressed(GUIquery.java:498)
at java.awt.AWTEventMulticaster.mousePressed(Unknown Source)
at java.awt.AWTEventMulticaster.mousePressed(Unknown Source)
at java.awt.Component.processMouseEvent(Unknown Source)
at javax.swing.JComponent.processMouseEvent(Unknown Source)
at java.awt.Component.processEvent(Unknown Source)
at java.awt.Container.processEvent(Unknown Source)
at java.awt.Component.dispatchEventImpl(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source)
at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source)
at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Window.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
at java.awt.EventQueue.access$200(Unknown Source)
at java.awt.EventQueue$3.run(Unknown Source)
at java.awt.EventQueue$3.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
at java.awt.EventQueue$4.run(Unknown Source)
at java.awt.EventQueue$4.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
at java.awt.EventQueue.dispatchEvent(Unknown Source)
at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.run(Unknown Source)

Here is the process to resolve such a problem.
at java.util.ArrayList.toArray(Unknown Source)
at GUIquery$2.mousePressed(GUIquery.java:498)`
Line 498 must be
String[] stringArray = objarr.toArray(new String[100]) ;
Check ArrayList documentation for <T> T[] toArray(T[] a)
When called this tries to store ArrayList<Object> members of type Object in a String[]. So it gave an ArrayStoreException. The root of the problem is that the computer has no idea what type cell is. You declared is as an Object, so that's its type. If getCellAt() returns strings, use String cell.
As a note that is not an elegant solution here, if you had an Object obj_str that you knew was a String, you could cast it with
String str = (String)obj_str;

java NullPointerException when trying to draw

I'm trying to draw a picture based on a random array of numbers. So far I've had partial success, as the background color (white) does come up.
However, the picture does not draw. Instead all I see is the white background and this error:
PixelAvatarGen
XphnX
Black and white or 8-bit color?
0 = B&W, 1 = 8bit
1
Print name to make into avatar.
2
5:2:7:0:3:6:7:0:6:7:7:3:1:4:0:6:5:1:7:4:0:0:5:6:6:3:0:2:3:7:2:4:7:5:4:2:3:6:0:1:4:1:6:4:1:1:1:5:7:5:1:5:4:0:4:5:1:5:6:0:5:4:6:0:0:6:0:0:0:6:7:5:2:6:4:0:1:1:1:7:0:2:1:4:0:2:3:3:3:3:2:6:6:2:6:4:2:7:5:4:7:3:3:3:1:5:1:6:1:3:4:6:0:1:1:2:5:7:4:1:0:2:4:4:4:6:3:7:7:1:0:6:3:6:3:7:6:5:2:5:5:3:5:3:5:4:4:7:0:5:7:4:2:4:5:7:1:0:3:2:7:7:2:3:5:5:2:7:5:6:6:7:4:3:0:7:4:7:1:0:0:7:4:4:3:7:6:0:4:2:7:6:7:3:2:4:2:7:3:0:5:6:6:7:7:2:2:0:2:5:7:6:5:1:0:6:1:5:2:0:7:0:7:0:4:1:0:3:4:3:7:7:4:4:2:7:0:7:4:7:1:6:1:4:4:2:4:7:3:0:4:4:6:6:3:5:
Drawing11
Exception in thread "AWT-EventQueue-0" Drawing11
java.lang.NullPointerException
at xphnx.pixelgen.Screen.paintComponent(Screen.java:25)
at javax.swing.JComponent.paint(Unknown Source)
at javax.swing.JComponent.paintChildren(Unknown Source)
at javax.swing.JComponent.paint(Unknown Source)
at javax.swing.JComponent.paintChildren(Unknown Source)
at javax.swing.JComponent.paint(Unknown Source)
at javax.swing.JLayeredPane.paint(Unknown Source)
at javax.swing.JComponent.paintChildren(Unknown Source)
at javax.swing.JComponent.paintToOffscreen(Unknown Source)
at javax.swing.RepaintManager$PaintManager.paintDoubleBuffered(Unknown Source)
at javax.swing.RepaintManager$PaintManager.paint(Unknown Source)
at javax.swing.RepaintManager.paint(Unknown Source)
at javax.swing.JComponent.paint(Unknown Source)
at java.awt.GraphicsCallback$PaintCallback.run(Unknown Source)
at sun.awt.SunGraphicsCallback.runOneComponent(Unknown Source)
at sun.awt.SunGraphicsCallback.runComponents(Unknown Source)
at java.awt.Container.paint(Unknown Source)
at java.awt.Window.paint(Unknown Source)
at javax.swing.RepaintManager.paintDirtyRegions(Unknown Source)
at javax.swing.RepaintManager.paintDirtyRegions(Unknown Source)
at javax.swing.RepaintManager.prePaintDirtyRegions(Unknown Source)
at javax.swing.RepaintManager.access$700(Unknown Source)
at javax.swing.RepaintManager$ProcessingRunnable.run(Unknown Source)
at java.awt.event.InvocationEvent.dispatch(Unknown Source)
at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
at java.awt.EventQueue.access$200(Unknown Source)
at java.awt.EventQueue$3.run(Unknown Source)
at java.awt.EventQueue$3.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
at java.awt.EventQueue.dispatchEvent(Unknown Source)
at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.run(Unknown Source)
Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
at xphnx.pixelgen.Screen.paintComponent(Screen.java:25)
at javax.swing.JComponent.paint(Unknown Source)
at javax.swing.JComponent.paintToOffscreen(Unknown Source)
at javax.swing.RepaintManager$PaintManager.paintDoubleBuffered(Unknown Source)
at javax.swing.RepaintManager$PaintManager.paint(Unknown Source)
at javax.swing.RepaintManager.paint(Unknown Source)
at javax.swing.JComponent._paintImmediately(Unknown Source)
at javax.swing.JComponent.paintImmediately(Unknown Source)
at javax.swing.RepaintManager.paintDirtyRegions(Unknown Source)
at javax.swing.RepaintManager.paintDirtyRegions(Unknown Source)
at javax.swing.RepaintManager.prePaintDirtyRegions(Unknown Source)
at javax.swing.RepaintManager.access$700(Unknown Source)
at javax.swing.RepaintManager$ProcessingRunnable.run(Unknown Source)
at java.awt.event.InvocationEvent.dispatch(Unknown Source)
at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
at java.awt.EventQueue.access$200(Unknown Source)
at java.awt.EventQueue$3.run(Unknown Source)
at java.awt.EventQueue$3.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
at java.awt.EventQueue.dispatchEvent(Unknown Source)
at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.run(Unknown Source)
This is the complete output of the program. The "1" after 0 = B&W and "2" after "Print name to..." are user input.
Here is the Screen.java:
public class Screen extends JPanel {
String[] pixels;
Color[] proxlol;
public Screen(String[] in1, Color[] in2) {
in1 = pixels;
in2 = proxlol;
}
public void paintComponent(Graphics g) {
super.paintComponent(g);
this.setBackground(Color.WHITE);
int row = 1, column = 1, row10, column10;
for(int i = 0; i != 256; i++) {
System.out.println("Drawing" + row + column);
g.setColor(proxlol[i]);
if(i == 17 ||
i == 33 ||
i == 49 ||
i == 65 ||
i == 81 ||
i == 97 ||
i == 113 ||
i == 129 ||
i == 145 ||
i == 161 ||
i == 177 ||
i == 193 ||
i == 209 ||
i == 225 ||
i == 241
){
row++;
column = 1;
}
row10 = row*10;
column10 = column*10;
g.fillRect(row10, column10, 10, 10);
System.out.println("Done drawing" + row + column);
column++;
}
}
}
In case needed, Main.java and Arranger.java are on pastebin.
I've got little experience with Swing before. What's going on?

You never assign a value to your class variable proxlol.
public class Screen extends JPanel {
String[] pixels;
Color[] proxlol;
public Screen(String[] in1, Color[] in2) {
in1 = pixels;
in2 = proxlol;
}
}
You assign (to no effect) the uninitialized class variable to the input parameter in2. So, in your paint method when you reference the array of Colors you get an NPE.

How to get the selected row from table model?

How to get the selected row from table model?
I tried the following....
checkBoxes[t].addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
int index = -1;
for (int i = 0; i < checkBoxes.length; i++) {
if (checkBoxes[i] == e.getSource()) {
String Status=null ;
DbUtility ViewAbsenties=new DbUtility();
ViewAbsenties.loadDriver();
ViewAbsenties.connect();
TableModel tm;
tm = table3.getModel();
if (checkBoxes[i].isSelected() == true) {
Status =(String) tm.getValueAt(i,8);
System.out.println("Status : " + Status );
}
}
}
}
}
when i run the above code, iam getting the following error.
Exception in thread "AWT-EventQueue-0" java.lang.ArrayIndexOutOfBoundsException: 1 >= 1
at java.util.Vector.elementAt(Unknown Source)
at javax.swing.table.DefaultTableModel.getValueAt(Unknown Source)
at EmployeeLeave$10$1.actionPerformed(EmployeeLeave.java:490)
at javax.swing.AbstractButton.fireActionPerformed(Unknown Source)
at javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source)
at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source)
at javax.swing.JToggleButton$ToggleButtonModel.setPressed(Unknown Source)
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(Unknown Source)
at java.awt.Component.processMouseEvent(Unknown Source)
at javax.swing.JComponent.processMouseEvent(Unknown Source)
at java.awt.Component.processEvent(Unknown Source)
at java.awt.Container.processEvent(Unknown Source)
at java.awt.Component.dispatchEventImpl(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source)
at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source)
at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Window.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
at java.awt.EventQueue.access$000(Unknown Source)
at java.awt.EventQueue$3.run(Unknown Source)
at java.awt.EventQueue$3.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
at java.awt.EventQueue$4.run(Unknown Source)
at java.awt.EventQueue$4.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
at java.awt.EventQueue.dispatchEvent(Unknown Source)
at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.run(Unknown Source)

there are three potential issues
JTables view could be Sorted or Filtered then you have to convertRowIndexToModel
Array(s) started with zero (getValue(0, 0) is 1st. row from 1st. column)
have to set javax.swing.ListSelectionModel properly or determine all selected rows
for better help sooner post an SSCCE